Bug 185930

Summary:	system freeze after kldload vmm.ko
Product:	Base System	Reporter:	lavr
Component:	amd64	Assignee:	freebsd-amd64 (Nobody) <amd64>
Status:	Closed Feedback Timeout
Severity:	Affects Only Me	CC:	allanjude, iron.udjin
Priority:	Normal
Version:	10.0-RELEASE
Hardware:	Any
OS:	Any

Description lavr 2014-01-20 16:10:00 UTC

Hardware: ASUS P7P55D LE
CPU: Core i5 661
RAM: 8GB
BIOS: VT-x = Enable , VT-d = Enable

Hardware: ASUS P7P55 LX
CPU: Core i3 540
RAM: 4GB
BIOS: VT-x = Enable , VT-d = Enable

CPU above supported VT-x EPT: VMX, POPCNT (from dmesg)

On both PC FreeBSD 10-RC[X], 10.0-RELEASE, 10-Stable after:

# kldload vmm.ko

PC freeze, keyboard locked

Comment 1 Vladimir Druzenko freebsd_committer

2014-05-20 17:31:43 UTC

Have same issue with ASUS P6T SE and i7 920 (C0/C1) and 930 (D0). Tested 
different versions of BIOS.
Only turn off VT-d in BIOS fix it.

releng/10.0 (p0) - crashes
releng/10 (20140413-r264414) - crashes
head (20140407-r264228) - no crash (fixed in head?)

Comment 2 iron.udjin 2014-12-07 21:22:34 UTC

I had the same issue with 10.0-STABLE on Core i7 870. This problem should not be present in 10.1-{RELEASE,STABLE}.